News tagged with evaporation

A new technology invented at the University of Arizona offers a positive environmental impact by slowing the evaporation of water from bodies of water such as mining tailings ponds and reservoirs, while simultaneously ...

Water evaporation in the Dead Sea valley contributes significantly to sea level drop and varies as a function of the season and meteorological conditions. Within the framework of the HEADS measurement campaign, ...

Using the stuff of sand, silicon dioxide, as a binding layer for replacement bone prosthetics could allow more biocompatible artificial joints to be manufactured as well as reducing the risk of post-operative infection, according ...

A team of researchers at the University of Twente (Netherlands) and German University in Cairo (Egypt) has developed sperm-inspired microrobots, which can be controlled by oscillating weak magnetic fields.

The recent Arctic blast that gripped much of the nation will likely contribute to a healthy rise in Great Lakes water levels in 2014, new research shows. But the processes responsible for that welcome outcome ...

(Phys.org) —People from 140 countries across the globe will be signing a treaty this month—its purpose is to reduce the amount of man-made mercury pollution being released into the environment. The treaty ...

Professor Takanobu Inoue of Toyohashi Tech's Department of Architecture and Civil Engineering has been conducting field surveys of mercury poisoning in Indonesia for over a decade. His findings have serious ...

The water budget of the troposphere, the bottom layer of the Earth's atmosphere, determines the weather and plays a central role in climate change. The isotope composition of water vapor, i.e. the ratio of ...

Over 200 researchers from Europe and around the world are currently meeting in Zürich to share the latest findings on the topic "Climate Change: Tree responses in Central European forests". One key question ...

Progress means that many things that are used in everyday life are becoming more manageable, practical and generally smaller. This also applies to biological and chemical experiments. To save material and ...

Evaporation

Evaporation is a type of vaporization of a liquid that occurs only on the surface of a liquid. The other type of vaporization is boiling, which, instead, occurs on the entire mass of the liquid.

On average, the molecules in a glass of water do not have enough heat energy to escape from the liquid. With sufficient heat, the liquid would turn into vapor quickly (see boiling point). When the molecules collide, they transfer energy to each other in varying degrees, based on how they collide. Sometimes the transfer is so one-sided for a molecule near the surface that it ends up with enough energy to 'escape' (evaporate).

Liquids that do not evaporate visibly at a given temperature in a given gas (e.g., cooking oil at room temperature) have molecules that do not tend to transfer energy to each other in a pattern sufficient to frequently give a molecule the heat energy necessary to turn into vapor. However, these liquids are evaporating. It is just that the process is much slower and thus significantly less visible.

Evaporation is an essential part of the water cycle. Solar energy drives evaporation of water from oceans, lakes, moisture in the soil, and other sources of water. In hydrology, evaporation and transpiration (which involves evaporation within plant stomata) are collectively termed evapotranspiration. Evaporation of water occurs when the surface of the liquid is exposed, allowing molecules to escape and form water vapor, this vapor can then rise up and form clouds.